<template>
    <div class="sidebar">      
        <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#324157"
            text-color="#bfcbd9" active-text-color="#20a0ff" unique-opened router>
            <template v-for="item in items">
                <template v-if="item.subs">
                    <el-submenu :index="item.index" :key="item.index">
                        <template slot="title">
                            <i :class="item.icon"></i><span slot="title">{{ item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subItem.index">
                                <template slot="title">{{ subItem.title }}</template>
                                <el-menu-item v-for="(threeItem,i) in subItem.subs" :key="i" :index="threeItem.index">
                                    {{ threeItem.title }}
                                </el-menu-item>
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.index" :key="subItem.index">
                                {{ subItem.title }}
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i><span slot="title">{{ item.title }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
import bus from "../common/bus";
export default {
  data() {
    return {
      collapse: false,
      items: [
        {
          icon: "el-icon-third-zhuye01",
          index: "/dashboard",
          title: "系统首页"
        },
        {
          icon: "el-icon-third-guanli",
          index: "/goods",
          title: "商品管理"
        },
        {
            icon:'el-icon-third-dingdan',
            index:'/order',
            title:'订单管理'
        },
        {
            icon:'el-icon-third-shujuzhongxin',
            index:'/statcenter',
            title:'数据中心'
        },
        {
            icon:'el-icon-third-zichanguanli',
            index:'/asset',
            title:'资产管理'
        },
        {
            icon:'el-icon-third-gongnengmokuai',
            index:'/plugin',
            title:'应用插件'
        },
        {
            icon:'el-icon-third-shezhi',
            index:'/profile',
            title:'设置'
        }
      ]
    };
  },
  computed: {
    onRoutes() {
      return this.$route.path.replace("/", "");
    }
  },
  created() {
    // 通过 Event Bus 进行组件间通信，来折叠侧边栏
    bus.$on("collapse", msg => {
      this.collapse = msg;
    });
  }
};
</script>

<style lang="scss" scoped>
.sidebar {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
  width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
  width: 160px;
}
.sidebar > ul {
  height: 100%;
}
</style>
